plugin updates
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@@ -261,7 +261,7 @@ function wpcf7_canonicalize( $text, $args = '' ) {
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* @return string Sanitized unit-tag.
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*/
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function wpcf7_sanitize_unit_tag( $tag ) {
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$tag = preg_replace( '/[^A-Za-z0-9_-]/', '', $tag );
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$tag = preg_replace( '/[^A-Za-z0-9_-]/', '', (string) $tag );
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return $tag;
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}
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